If you're considering Soft tissue Fillers...

Soft tissue fillers are substances that are injected into various layers of the skin. Volume is placed beneath contour depressions, wrinkles or folds - to soften or eliminate unwanted irregularities. Fillers include substances such as collagen, hyaluronic acid (Restylane), autogenous fat and hydroxyapetite (Radiance). Each soft tissue filler has unique properties and degrees of permanence. Treatments are customized based on the skin type, the deformity and patient goals.